88. Implement Stack Using Array with Push and Pop Operations

#include <stdio.h>
#include <stdint.h>
#include <string.h>

#define MAX 10

static int arr[MAX];
static int top =0;

void push(int n);
void pop(void);

void process_stack(int n)
{
    char cmd[20];
    int value;

    for (int i = 0; i < n; i++)
    {
        fgets(cmd, sizeof(cmd), stdin);

        /* Check for push command */
        if (strncmp(cmd, "push", 4) == 0)
        {
            /* Extract the number after "push" */
            sscanf(cmd, "push %d", &value);
            push(value);
        }
        /* Check for pop command */
        else if (strncmp(cmd, "pop", 3) == 0)
        {
            pop();
        }
    }
}


int main() {
    int n;
    scanf("%d", &n);
    getchar(); // Consume newline after number

    process_stack(n);
    return 0;
}

void push(int n){
    if(top==MAX){
        printf("Stack Overflow\n");

    }else{
    arr[top++]=n;
    }
}

void pop(void){
    if(top==0){
        printf("Stack Underflow\n");
    }
    else{
        printf("%d\n",arr[--top]);
    }
    return ;
}